When changing the oil in the automatic box. Do I need to change the oil in the automatic transmission? This terrible CVT - myths and truth about continuously variable transmissions

Many motorists and even mechanics believe that there is no need to change the oil in an automatic transmission; frequent changes in lubricant lead, in their opinion, to a decrease in the life of an automatic transmission. Their opponents argue that changing the transmission fluid is not a privilege, but a necessity. Who is right? Let's figure it out.

The answer to the question: "How often is the replacement transmission mixture in the automatic transmission?” is located in the instruction manual for the machine. The manufacturer, guided by certain knowledge, indicates the optimal period for changing the consumable mixture. Sometimes manufacturers indicate that there is no need to change the oil poured into the gearbox; there are no cars on such models drain plugs for draining oil from the automatic transmission.

Automatic transmission device

Based on the experience of drivers, generally accepted standards, the oil life of automatic transmissions is affected by:

1. Automobile model. Exist modern types cars equipped with boxes, the design of which does not provide for draining consumables.
2. Filled oil base. Synthetic fluids have desired composition to ensure optimal operation of the automatic transmission and protect it from wear, they are replaced after 50-60 thousand kilometers. When pouring the transmission mixture into the box, take into account the base of the filled fluid; mixing mineral water with synthetics or semi-synthetics is unacceptable. Synthetic oils expensive, contain a certain composition of additives, ensure the normal operation of automatic transmissions.
3. operating conditions. If the car is used under non-ideal conditions: hot climate, high dust content in the air, frequent towing of a trailer, standing in traffic jams, and so on. These factors lead to overheating of the lubricant, its dilution, so the oil should be changed twice as often as the period recommended by the manufacturer.
4. The service life of the transmission mixture. Many instructions indicate how long it takes to change consumables in automatic transmissions.
5. Mileage. As a rule, the manufacturer regulates the mileage, after which the fluid must be replaced.

Why is a complete transmission mixture change necessary?

In the box, the automatic transmission mixture performs the following functions:

• lubricates the components and mechanisms of the box;
• promotes the removal of contaminants and small particles;
• responsible for cooling the unit.

Adding oil to the automatic transmission

By topping up the lubricant, you do not remove the formed sediment from the box: chips, particles of contaminants. At full shift transmission fluid, these harmful impurities are completely removed from the unit. Keep in mind: for most foreign models, the normal service life is 5-7 years with an annual mileage of 35 thousand kilometers. Then the car is disposed of, in such a situation, automatic transmission oil can be changed every two years. For our country specified vehicles It is customary to call them “almost new”, with their further operation it is worth giving preference to a more frequent change of lubricant - about once every 50 thousand kilometers, or change the fluid every 25 thousand kilometers driven under severe operating conditions.

The need to change the transmission mixture is indicated by: blackening of the liquid, the presence of bad smell burnt, the presence of small particles in its composition. To check the condition of the gear oil, drop a drop of lubricant from the dipstick onto a tissue. The presence of one of these signs indicates the need for a complete replacement of the consumable.

Watch a video about the period for changing the lubricant in the automatic box:

Summing up

Answering the question: “How often do you need to change the transmission fluid in an automatic transmission?” It's best to look in the owner's manual. According to it, the manufacturer indicates the need to check the level of the mixture inside the automatic box, recommends the optimal type of lubricant for normal operation unit. Manufacturers provide information on the volume of oil required for filling, as well as its marking.

According to the instructions, the use of oil that does not meet the recommended parameters will damage the mechanisms inside the box. Often, motorists prefer manual transmission instead of automatic transmission, believing that the maintenance of the first design is easier. In reality, the automatic transmission resource depends on the timely replacement of the lubricant.

On automotive market there are universal mixtures for automatic gearboxes, applicable to most transmissions. The versatility of these materials is due to their characteristics, which far exceed the requirements of automatic transmission dealers in all respects. famous brands have a series of universal fluids - this allows the buyer to quickly make a choice, be sure of reliable protection unit from wear.

When to change the oil in the gearbox? How can you determine the oil level in an automatic transmission?

Many motorists have a question - when to change the oil in the automatic transmission? And in general, is it worth changing it (many manufacturers claim that their transmissions should not be serviced at all, they say, the oil poured into the box lasts the entire life of the car)?

In our article we will understand this, in fact, quite difficult question, we will find out what affects the replacement interval, how to operate the box in order to extend its "lifetime". In order to understand whether it is necessary to change the oil in automatic box gears (and if so, after how many), you should first figure out why it is in an automatic box at all, what are its functions.

Everyone knows why oil is needed in car components - in order to reduce friction, provide lubrication of parts, protect mechanisms from corrosion and rapid wear. Also, the oil allows you to slightly cool the parts - during operation, the temperature of many nodes can rise to 600-800 degrees Celsius. Gearbox oil is used in the same way. However, this is true, first of all, for mechanical boxes. automatic transmission, of course, uses oil for the same - but this is by no means its main function.

The fact is that in the "machines" oil (or rather, transmission fluid- ATF) is the so-called "working fluid", which is involved in the transmission of torque. The exception is CVT boxes - they have a slightly different principle of operation. It turns out that for the "machine" the requirements for oil are much higher than for the "mechanics".

For example, if the oil mechanical box foam (this happens if there is too much oil in the box or when mixing two different types liquid), this will only lead to increased wear - as the foamed oil loses its lubricating properties. If this happens in an automatic box, it may stop working altogether). Therefore from ATF status in the "machine" directly depends on the quality of its work. But in the process of operation, the properties of the oil change!
There are some operating conditions, which negatively affect the quality of the oil and the period of its use:

• excessively high loads on the automatic transmission (usually due to constant driving with load - trailers, a large number of people in the car, riding with low level ATF);

• poor road conditions (everyone knows that off-road driving is one of the most common causes of “early death” of automatic transmissions);
• low fuel quality (in this case, the required power develops at a higher high revs crankshaft, and this implies a higher temperature of the oil in the box);
• "Jagged" driving rhythm (frequent alternation of accelerations and decelerations, "start-stop" city traffic jams);
• too low ambient temperatures (too much increase ATF viscosity);
• too much high temperatures ambient air (in addition to the fact that the box overheats faster, the ATF viscosity drops too much);
• quick start from a place (even boxes that have a warm-up mode are not recommended to give a high load from a place, since the oil has not yet warmed up to operating temperature);
• slippage on ice, in snow, sand and mud (in general, for such situations, the machine provides winter mode, in which the start is made from the second gear, it is recommended to use it under the described conditions).

Is it necessary to change the oil in the "machine"?

Operating oil - brown

To begin with, a little about those boxes that are considered "unattended". In connection with what manufacturers make such a statement? Firstly, manufacturers rely on the life of the car, which is generally accepted for Europe and America. That is - after the car has been used for 3-5 years, it is necessary to get rid of it (at the same time, Europeans travel an average of 150 thousand kilometers in 3 years). For a Russian car owner, this is practically new car! Secondly, the "maintenancelessness" of the box is ensured by installing two magnets on the automatic transmission that collect chips. This, of course, partially helps to increase the life of the oil, but does not completely clean it. Very often, car owners, having believed the statements of the manufacturers, do not change the ATF and are faced with a complete failure of the box. As a rule, ATF-related malfunctions in the box begin to appear after 200,000 kilometers. Closer to 300,000, box failure is almost guaranteed. However, when timely replacement The oil life of the box can easily be extended to half a million kilometers.

How often do you change the oil in an automatic transmission?

So, we came to the conclusion that it is still necessary to change the oil in the automatic transmission. What are the replacement times? Manufacturers of automatic machines that are not maintenance-free tend to list two numbers - the average oil change interval and the interval that is used for heavy-duty vehicles. The list of criteria by which it is determined whether the operating conditions are difficult for the transmission has already been indicated above.

How often should the oil be changed?

As a rule, some of them are quite typical for Russian conditions therefore it is recommended to change the automatic transmission oil according to the heavy duty intervals. For relatively old cars (approximately 2000 and older), the average period ATF replacements in automatic transmission it is about 60 thousand kilometers, for newer ones - about 80. For difficult working conditions, this period is halved - that is, 30 and 40 thousand kilometers, respectively. In addition, for automatic transmissions, there are four main requirements, based on which a decision is made on whether it is worth changing the oil in an automatic transmission even earlier than this period:

• lack of sharp acceleration and sudden braking;
• smooth movement at a uniform speed;
• good quality of the road surface;
• refueling the car only with high-quality fuel.

It turns out the following situation. If one of the operating rules is violated, then the mileage after which the oil in the automatic transmission should be changed is reduced by another 25%. If two or three rules are violated, then the mileage is halved, if all four - by 75%. Similar conditions help save the gearbox. Consider similar situation For example. Manufacturers of modern maintenance-free machines expect that the car will pass approximately 250 thousand kilometers. If the operating conditions imply that the mileage will take place in conditions harmful to the box, the replacement period is halved - that is, it is approximately 125 thousand kilometers.

If the vehicle is driving poor quality fuel and on the roads Bad quality- the replacement period is approximately 60-65 thousand kilometers.

Perhaps such an interval will seem too short to motorists - but as soon as you estimate the cost of replacing the ATF and the cost of repairing the gearbox, the choice becomes obvious. Of course, it is quite difficult to objectively assess how often a car is subjected to harmful effects. However, given the role of such a node as an automatic transmission, it is better to play it safe and change the ATF in advance. There is another criterion by which you can evaluate when to change the oil in the box. This is the color of the oil itself in the box and its smell, as well as its consistency. Usually absolutely fresh oil has pink or Crimson. Oil in working condition - brown. If the oil is very dark, contains inclusions, chips, has a rancid smell (the so-called “burnt” oil), it should be replaced immediately. Also, the presence of chips on the above-mentioned magnets can tell a lot about the condition of the box (by the way, from time to time it is recommended to drive the car to a car service in order to remove this chips, since its presence drastically reduces both the efficiency of the oil change and the operational properties"fresh" ATF).

Remember that there is no exact answer to the question “how often to change the oil in the box”, it all depends on the condition of the car and the foresight of the owner. In addition, it should be remembered that the amount of drained oil must be equal to the filled one. The replaced volume is usually about 40 percent of the total volume of oil in the box (it is equal to the volume that is within oil pan boxes). In the event that the replacement is carried out under pressure, the volumes of old and new oil are almost equal.

The first place in the World Hit Parade of questions from car owners. Or "sometimes it's easier to give a link"...***

Let's get started, which is most often understood as "replacement" and implies the addition / dilution of old oil, including (or maybe not) replacing the box filter and its pan gasket. Most of the oil remains in the torque converter and just doesn't want to come out. A clear uncertainty is created - something indefinitely dirty, with an unknown frequency, is diluted clean oil to an indefinite extent. It’s even interesting what such a recommendation might look like if it were planned: you need to partially update the oil ... at what mileage? And how often? Some especially zealous boxers invite you to do this almost every 30,000 (!) Km. And here is the question: calculate the cost-effectiveness of this procedure, given the known cost of replacing the automatic transmission on a turnkey basis, which in our time, conditionally, for the most common German boxes, is about 1000 euros. Sometimes even higher, of course. No matter how you think about it, if during the life of a modern box (about 10 years) you resorted to this procedure at least once every two or three years (quite a humane interval), then at least 1/3 of the cost of replacing the box was paid without direct need.

Option number two is a real oil change. The replacement is carried out through an oil change unit (photo in the header) - by completely displacing the old volume and filling in a new one. This is the real oil change in automatic transmission. Along with this, the pan / pan gasket and filter are changed. A one-time fluid change will require double the volume" branded oil, with all tolerances", which costs about 30 to 50 euros per liter for modern boxes (producers need to at least somehow beat off illiquidity with marginality). And if we pump two full volumes of oil through the system, we get a budget, don’t believe it, from 600 to 1000+ euros This option is obviously the most "officially recommended", "with all tolerances".

Option number three, life hack. We spit on the "tolerances" and find the cheapest "compatible" oil aka "transmission oil", and we do the flushing in the same way and generally "flushing" (well, or by him). Having estimated the cost of domestic or "non-brand" oil, work, filters, we can reach the cost of thousands of 10-20 thousand rubles "for everything", which allows us to consider this procedure really justified, flawless from all sides - a real oil change.

1. Is it necessary to "change the oil in the automatic transmission"?
The oil in the box is contaminated mainly by the wear products of the clutch packs - carbon dust of the smallest fraction, in terms of particle size, it is almost like a dye. Why change "black" to "red" if everything is working fine anyway?

2. This "dye" gradually "accumulates" on the valve body valves, the box starts to switch with a jerk ...
If it already switches in this way, then changing the oil will not solve this problem. And if not yet, then it is impossible to determine for sure whether the replacement helped in any way ...

3. I was changed and jerky switching is gone ...
Yes, but you also got your adaptations reset and now the question is how long will it last and when will it all come back. Most often within a couple of days.

4. I was changed and the box became "like new".
It is doubtful, because the clutches wear out inevitably and every day. Repair of modern german box inevitable every 5-10 years, depending on the load. And its new electronic or hydraulic part often exceeds the entire mechanical cost. And the probability of breakage of hydraulics / electronics in new boxes is almost higher.

5. They changed the oil for me, everything got better even with each change, and also, most likely, the resource has already been extended and even exceeded - and I’m so calmer.
If you really changed the oil as it got dirty, did it right, with all certified materials, you have already paid for your overhaul of the box with just oil changes. This, of course, did not add a resource to all its wearing parts, did not reduce the likelihood of breakage due to natural causes of wear of the same oil pump, for example. But, as you assure, everything works fine for you, the box is still "like new" and the reason is that you changed the oil (by any means). Great, it remains only to see a live box with city mileage, say, over 100-150 tkm without obvious signs fatigue. Then, probably, this strategy should be recognized as winning at least formally.

6. What signs are we talking about?
Google " stall test"(I don't give links intentionally). And also try to rock the box with quick "D-R-D-R-D" shifts at idle. Serviceable modern box generally "imperceptible" in such modes. Faulty / worn out already on the second or third repetition will begin to shake the transmission with blows. Not to mention the fact that a serviceable box does not manifest itself at all during normal operation. It would be very interesting to look at a modern ZF with a mileage of over 100 tkm "in the city" and to be "like new".

7. Everyone knows that by setting a `lifetime` guarantee - 5 years, 100,000 miles, marketers have unreasonably limited the resource of the node - there are no oil changes, so the box is killed. And if you change it, violating this conspiracy, then the box will go much longer, as often happens on old machines.
Yes, the "oil for life" technological strategy initially looks suspicious and fits well with the standard of modern anti-consumer trends, the only trouble is that modern mechatronic boxes have 101 reasons to break down simply because of their overcomplication - there is not even a second such complex unit in the car . By this criterion, automatic transmissions have long surpassed the car as a whole. Comparison with the era of domekhatronnyh boxes is inappropriate. And the most remarkable thing is that it is by no means a mechanical or even a hydraulic part that breaks down - oil will not help much here. But a forced measure to get rid of a dubious operation " scheduled replacement oil" is a rare example of the fact that the principle "works - do not touch" really benefits the consumer, freeing service workers from far-fetched problems, and the consumer from unforced costs of money and time.

8. Is it necessary to "change the oil in the automatic transmission"?
Personally, I haven’t changed it for 200,000 km, I don’t notice any differences in work yet. Will be - friction clutches have worn out, a box for replacement. We threw the box - we drove on without unnecessary stops to "replace" the oil. Modern machines their complexity is neutralized by widespread () - changing the automatic transmission has now become cheaper than servicing. And maintenance, in turn, should practically not affect the resource.

===Editing after the fact.

Gear is in second place in popularity. But nevertheless, this gearbox is gradually replacing the mechanics, which so far occupies a leading position. automatic transmission has whole line benefits, the most important of which is ease of use. But not everyone knows how to properly maintain these boxes. But timely care is the key to stable and long-term operation of the transmission. Are there maintenance-free automatic transmissions? Do I need to change the oil in All this we will consider in our today's article.

Automatic transmission characteristic

It is important to understand that the device and principle of operation of this transmission is fundamentally different from the mechanical one. So, automatic transmission oil plays a role working fluid:

• Lubricates transmission parts and assemblies.
• Removes heat from heating elements.
• It is the main medium for the hydraulic system, due to which gear shifting is carried out.
• It plays the role of a clutch in a torque converter, circulating through two turbines and transmitting torque from the flywheel to the automatic transmission planetary gear set.

Why does oil age?

Any lubricant will eventually lose its properties and characteristics. This is due to the fact that the liquid is used in harsh conditions. Often the oil overheats due to traffic in traffic jams, as well as poor cooling due to a clogged radiator. Also, during operation, the liquid is saturated various products workings from planetary gear and other transmission components. And of course, it is worth noting the fact that the oil always works under pressure in the box. Usually this indicator is 5 bar.

Is it necessary to change transmission oil in automatic transmission? Considering that the fluid is subject to constant wear and tear, experts still advise carrying out automatic transmission maintenance.

What does the manufacturer say?

Almost all global automakers unanimously say that automatic transmissions are maintenance-free and do not need to be replaced with ATP fluid. Like, oil is poured into the transmission for the entire period of operation. But this is only possible in European countries where the car is bought for a period of five years or runs no more than 150 thousand kilometers.

In such conditions, the car really will not need automatic transmission maintenance. But our realities are far from European ones. It is not uncommon for cars with a gun to drive 300, 500 or more thousand kilometers. Naturally, if you do not perform any maintenance, such a box will quickly become unusable.

About pollution

Many motorists will say that gear oil does not get as dirty as engine oil. And they will be right. After all, ATP liquid is not saturated with combustion products that occur during operation of the internal combustion engine. But it must be said that the oil is saturated with other components. This is fine aluminum dust that occurs when the planetary gear set, friction clutches, torque converter and other automatic transmission elements are worn out. Yes, all these products are cleaned in a filter that is installed in the transmission. But you have to understand what it is. consumable and sometimes needs to be replaced.

note

If maintenance is not performed, it becomes clogged, and it is more difficult for the oil to pass through its pores. Because of this, the load on the pump increases, since it must generate sufficient pressure for the operation of the valve body of the box. At first, the pump starts to howl, and then completely wedges. And in the case when the filter is paper, it can even be torn apart. Then all the dirt that was previously detained, along with the remnants of the filter, enters all cavities of the valve body and torque converter. This entails increased wear rings, bushings and other mechanisms. Also, due to dirt, electronic components (sensors and solenoids) may not work properly.

Regulations

Each motorist changes the oil in the automatic transmission at a different interval. Someone does this every 40 thousand, and someone resorts to replacing after 120. But generally speaking, the oil in an automatic box lasts about 80 thousand kilometers. At the same time, experts advise reducing this period by 20 thousand if the box is used in heavy duty. These modes include:

• Aggressive driving style. It's a ride on increased speed, frequent use sport mode. This also applies to abrupt start with wheel slip.
• Operation in traffic jams. Frequent traffic jams and movement in the "start-stop" mode significantly load the box. It can overheat (especially if the car is old and the ATP-liquid cooling radiator has not been cleaned in it).
• Heavy weather. First of all, these are strongly low temperature air (20 or more degrees below zero). It is also worth reducing the interval when operating in extreme heat (when the temperature exceeds +35 degrees).
• Long-term movement of the car at maximum loads. What does it mean? This characteristic refers to the operation of the machine in excess of the permissible gross weight. This is possible when transporting heavy loads, as well as when towing a trailer.
• Off-road driving. Here, prolonged slippage of the clutch and overheating of the box are possible.

Do I need to change the oil in the automatic transmission if the car was purchased for secondary market? Experts advise changing the ATP fluid when the car was bought "from hand" and there is no confirmation that the box was previously serviced. Also, the box may ask for an oil change if it is in poor condition. This may be black, a characteristic burning smell, or the presence of metal dust on the probe. Do I need to change the oil in the Solaris automatic transmission? Below we will consider separately the cases of replacing ATP fluid with different brands cars.

Solaris and Kia

These cars are side by side because they are equipped with the same six-speed gearbox gears. What do manufacturers say about service? Do I need to change the oil in the Solaris and Kia Rio automatic transmissions? The instruction manual states that the automatic transmission is maintenance-free. But in fact, it needs an oil change. Otherwise, you can get into expensive repairs - experts say so. How often should the operation be performed? Motorists are advised to change the ATP fluid every 40 thousand kilometers. This is especially true for those who use the machine in those very difficult conditions. Do I need to change the oil in the Kia Rio-3 automatic transmission as often? Experts give a positive answer. The box on the Kia is loaded as heavily as on the Solaris. So don't ignore this regulation.

What kind of product to fill in the box? For Hyundai Solaris and Kia Rio cars, a single oil standard is provided. This is SP-3. If you need to change the oil in the automatic transmission, then how much fluid to use? As for the quantity, the oil filling volume in the Hyundai Solaris and Kia Rio box is 6.8 liters. But you need to understand that this volume will vary depending on the method by which the replacement will be made (partial or complete). So, for this operation, up to 9 liters of liquid may be required. And we will tell you in detail about the replacement methods at the end of the article.

Ford Focus second and third generation

These cars are very popular in Russia, and many models can be found on the machine. Do I need to change the oil in the automatic transmission on the Ford Focus-2? the manufacturer says that the liquid is here, as is the case with Korean cars filled for the entire period of operation. But experts advise to still perform this operation. Here the replacement schedule is 100 thousand kilometers. Under the condition of heavy operation, this interval is reduced to 80 thousand. The same answer can be obtained to the question of whether it is necessary to change the oil in the Ford Focus-3 automatic transmission. On the "Focuses" of the second and third generation are the same boxes of the PowerShift series. For them, it is recommended to use WSS-M2C200-D2 oil. This liquid is produced by the following companies:

• Castrol.
• "Liquid Moly".
• Shell.
• "Motul".

In terms of volume, this transmission requires no more than 2.3 liters of fluid. And on boxes of the third generation, two liters of oil are needed at all.

Peugeot 308

Do I need to change the oil in the automatic transmission of this car? On french cars The manufacturer officially recommends changing the oil every 100 thousand kilometers. On this model a fairly popular box is installed - AL-4. For this transmission it is recommended to use original oil LT 71141 from the manufacturer "Mobile". The volume will differ depending on which method the replacement will be made. If it is partial, then three liters are required. In the case of a complete one, about seven are needed.

We also note that oil with such tolerances can be found from other manufacturers:

• "Total".
• "Liquid Moly".
• Esso.

Volkswagen Polo

In Russia, the Volkswagen Polo is widespread. It can be equipped with both manual and automatic transmission. And if everything is clear from the first, then what about the machine gun? Do I need to change the oil in the automatic transmission of the Volkswagen Polo sedan? Here, the manufacturer recommends replacing every 60 thousand kilometers. In this case, the filter must be replaced. As for the type of fluid, VAG G 055 025 A2 is recommended for this box. By the way, it is also suitable for boxes of Audi and Skoda cars. The volume for replacement is from three to seven liters. Do I need to change the oil in the automatic transmission of the Polo sedan if it was purchased on the secondary market? As we noted above, after the purchase, this operation will not be superfluous, since there is no guarantee that the transmission has been serviced before. And so you will be 100 percent sure that new, fresh oil is poured into the box.

About replacement methods

There are two ways:

• Partial replacement. It is relevant among many motorists. What is its essence? For replacement, half of the filling volume of ATP fluid is bought. Next, the car is driven to viewing hole and the old oil is drained from the automatic transmission through a standard hole. As a rule, the volume is up to 40 percent of the total. After that, a new one is poured through the probe. But since the probe is hidden in the depths engine compartment, you will need a tube of 40 or more centimeters, as well as a watering can. With this device, you can fill the desired volume of liquid without loss. The advantage of this method is savings. After all, all the work can be done by hand. But there is also a drawback. Since the oil is not completely changed, but only renewed, the interval between operations must be halved.

• Complete replacement. It involves connecting the outlets of the automatic transmission tubes to a specialized stand. The latter pumps out the old liquid under pressure, and it is simultaneously replaced by a new one. Usually connected through the tubes of the cooling radiator. The advantage of technology is that the oil changes completely. Accordingly, the replacement interval will be twice as high as in the previous case. But such an operation cannot be performed by hand. And buying a whole stand is not justified for the sake of a couple of uses. Also on complete replacement leaves more oil. The volume will be two to three liters higher than the filling one. This is necessary in order to completely rinse the box from old fluid. Whether it is necessary to change the oil in the automatic transmission in this way, everyone decides for himself. It cannot be said that partial method better. But from a technical point of view, the full method is more correct.

Conclusion

So, we found out whether it is necessary to change the oil in the automatic transmission. As you can see, this operation should be performed without fail, regardless of whether the replacement is prescribed by the manufacturer in the instructions or not. Such an operation will clean the box of old deposits, as well as extend the life of the mechanisms. this work should be made every 60-80 thousand kilometers. A timely serviced box is the key to a long and stable operation all its elements and components. The resource of such a transmission will be close to mechanics. And kicks and jolts will not happen at all if, along with the replacement, you follow the rules of operation (without aggressive driving, slipping, and so on).